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| author | Tulio Magno Quites Machado Filho <tuliom@linux.ibm.com> | 2019-10-20 16:00:30 -0500 |
|---|---|---|
| committer | Gabriel F. T. Gomes <gabrielftg@linux.ibm.com> | 2019-12-27 15:02:10 -0300 |
| commit | 1ef9b6e0bf1268050e74087c4f6bd056263a28c7 (patch) | |
| tree | 3b3f7905c03c4890473ab9da3e7fdc5dbb42241e /sysdeps/ieee754/ldbl-128 | |
| parent | 863d775c481704baaa41855fc93e5a1ca2dc6bf6 (diff) | |
| download | glibc-1ef9b6e0bf1268050e74087c4f6bd056263a28c7.tar.gz glibc-1ef9b6e0bf1268050e74087c4f6bd056263a28c7.tar.xz glibc-1ef9b6e0bf1268050e74087c4f6bd056263a28c7.zip | |
Do not redirect calls to __GI_* symbols, when redirecting to *ieee128
On platforms where long double has IEEE binary128 format as a third option (initially, only powerpc64le), many exported functions are redirected to their __*ieee128 equivalents. This redirection is provided by installed headers such as stdio-ldbl.h, and is supposed to work correctly with user code. However, during the build of glibc, similar redirections are employed, in internal headers, such as include/stdio.h, in order to avoid extra PLT entries. These redirections conflict with the redirections to __*ieee128, and must be avoided during the build. This patch protects the second redirections with a test for __LONG_DOUBLE_USES_FLOAT128, a new macro that is defined to 1 when functions that deal with long double typed values reuses the _Float128 implementation (this is currently only true for powerpc64le). Tested for powerpc64le, x86_64, and with build-many-glibcs.py. Co-authored-by: Gabriel F. T. Gomes <gabrielftg@linux.ibm.com> Reviewed-by: Florian Weimer <fweimer@redhat.com>
Diffstat (limited to 'sysdeps/ieee754/ldbl-128')
| -rw-r--r-- | sysdeps/ieee754/ldbl-128/bits/long-double.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/sysdeps/ieee754/ldbl-128/bits/long-double.h b/sysdeps/ieee754/ldbl-128/bits/long-double.h index eac89e233a..17283d3065 100644 --- a/sysdeps/ieee754/ldbl-128/bits/long-double.h +++ b/sysdeps/ieee754/ldbl-128/bits/long-double.h @@ -18,3 +18,4 @@ /* long double is distinct from double, so there is nothing to define here. */ +#define __LONG_DOUBLE_USES_FLOAT128 0 |